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Inquest into the Death of Patricia (Jill) Croxon

Deceased

Patricia (Jill) Croxon

Demographics

79y, female

Coroner

Coroner Archer

Date of death

2019-08-05

Finding date

2023-02-15

Cause of death

medication related cardiac arrest (verapamil and propranolol) in a patient with community acquired pneumonia and immunosuppression associated with treatment for rheumatoid arthritis

AI-generated summary

Mrs Patricia Croxon, a 79-year-old admitted with community-acquired pneumonia, died from medication-related cardiac arrest caused by verapamil and propranolol. The verapamil was charted in immediate release form when she had been taking slow release (Cordilox) in the community. A failure to tick a box on the medication chart indicating slow release form, combined with weekend pharmacy closures and the absence of out-of-hours pharmacist oversight, meant the error was not identified before administration. She received six tablets of immediate release verapamil at 8am on 4 August instead of slow release, causing dangerously high serum levels that peaked rapidly and depressed cardiac function alongside propranolol. The coroner made no criticism of individual clinicians but identified systemic issues. Since her death, Canberra Health Services has implemented a digital health record system requiring explicit selection of drug formulation, removed immediate release verapamil from the night cupboard, and expanded ward-based pharmacy services, changes likely to prevent such errors.

AI-generated summary and tagging — may contain inaccuracies; refer to original finding for legal purposes. Report an inaccuracy.

Specialties

emergency medicinerespiratory medicinecardiologyintensive carepharmacy

Error types

medicationsystem

Drugs involved

verapamilpropranololcordiloxderalin

Clinical conditions

community-acquired pneumoniahypotensioncardiac arrhythmiahypertensiontachycardiarheumatoid arthritis with immunosuppressioncardiac arrest

Contributing factors

  • failure to indicate slow release formulation on medication chart
  • administration of immediate release verapamil instead of slow release form
  • absence of pharmacist oversight out of hours
  • weekend pharmacy reduced staffing
  • delayed administration of propranolol causing concurrent high serum levels
  • night cupboard dispensing process without real-time pharmacy review
  • concomitant use of verapamil and propranolol not clinically indicated
  • patient vulnerability from pneumonia and comorbidities

Coroner's recommendations

  1. No specific recommendations made. The coroner declined to recommend 24-hour, 7-days-a-week pharmacy operations as this is not standard practice across Australia and involves funding decisions beyond the coroner's scope.
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